dewey



(No Model.)

M. W. DEWEY.

PRINTING TELEGRAPH. I No. 395,614. Patented Jan. 1, 1889..

WITNESSES:

4 06 @WMW 9. g. exam,

liNiTEn STATES PATENT tries,

MARK XV. DEXVEY, OF SYRACUSE, EVV YORK, ASSIGNOR OF TVO-THIRDS TO EMILLAASS AND CHARLES H. DUELL, OF SAME PLACE.

PRINTING=TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 395,614, dated January1, 1889.

Application fi January 30, 1888. Serial No. 262,367. (No model.)

To all whom it may concern: plane therewith. These colid'ucting-platesare Be it known that I, MARK XV. DEWEY, of all connected to one and thesame metallic Syracuse, in the county of Onondaga, in the strip, b,which is connected with the battery State of New York, have invented newand A and ground. A metallic key, C, which also useful. Improvements inPrinting-Telegraphs, serves as an indicator, is pivoted in the cenofwhich the following, taken in connection ter of the aforesaid annulus ofplates A B O, with the accompanying drawings, is a full, &c., and isprovided with a suitable insulated clear, and exact description. handle,0, by which to rotate it on its axis. The object of this invention is toprovide The free end of said key carries a suitable IO aprinting-telegraph apparatus which shall be electrode, C, which is inthe path of the aforesimple and comparatively inexpensive in consaidplates A B C, &c., and bears on said path, struction and capable ofbeing operated we said electrode being preferably of the form ofpeditiously and without requiring long practhe metallic spring, as shownin Fig. 3 of the tice to enable a person to transmit messages drawings.The axis of this combined key and 15 quickly and intelligently on oneline-wire. indicator is connected with the line-wire e,

The invention is fully illustrated in the anand by revolving the key Con its axis the neXed drawings, in which electrode 0' is drawnsuccessively across the Figure 1 is a diagram view of two connectplatesA B O, &c., and intervening insulating ing-stations, each having myimproved appa material, and thereby a corresponding num- 20 ratus,consisting of a transmitter, a receiver ber of impulses are sent overthe line to the or printer, call-bell, and batteries andconnecreceiving-station, where they pass through the tions. Thecall-bell and transmitting-instruarmature F, which turns the type-wheelswith ment, which are fully illustrated at the staa step-by-stepmovement, aided by the spring tion designated by the letter X, are onlyinf on the opposite side of the lever.

25 dicated at the station designated by the let- 'When the key C of thetransmitter is roter Y, and thereceiving-instrument or printer, tatedthe distance from one contact-plate to which is fully shown at thelatter station, is the next, the circuit is broken intermediately onlyindicated at the station X, but the conby the intervening insulatingmaterial, and nections are alike at both stations. This is the breakingof the circuit causes the arma- 30 done to simplify the drawings and toavoid ture to reoede from the magnet F, and thus confusion, as it willbe readily understood that causes the lever I to turn the type-wheelsonethe apparatuses at the two stations are alike, half of the distancefrom tooth to tooth; and so that messages may be sent in opposite diwhenthe armature is again attracted by the rections. Fig. 2 is a transversesection on magnet the ratchet-wheel is again turned to 5 line m on,Fig. 1. Fig. 3 is also a vertical transcomplete its movement from toothto tooth, verse section of the same, showing more clearly and as thetype-wheels turn synchronously the electrode connected to the combinedkey with the ratchet-wheel, and the number of and indicator. The viewofthe receiver shown characters and spaces on the type-wheel corin Fig. 1is taken from the rear thereof to betrespond to the number of teeth onthe ratchet- 40 ter illustrate the mechanism. Fig. 4 is a top wheel, thetype wheels are moved the distance plan view of the printing-lever andits appurteof two adjacent letters or characters, and nances; and Fig. 5is an edge view of the typewith a complete revolution of thetransmitwheels, showing the mechanism for shifting ting-key thetype-wheels make a complete the same. revolution. By making the plates AB O,

45 The transmitter is composed of the follow- &c., to correspond to thecharacters on the 5 ing parts, viz: a series of conducting-plates,type-wheels, the key 0, pointing to said mark- ABC,(he,arranged,preferably,equidistantly ings, serves as an indicator forguiding the apart, in the form of an annulus, and preferoperator inoperating the key. ably countersunk in the bed D, of non-con- Ldesignates the printing-lever, which is 50 ducting material, so as toform one uniform pivoted intermediate its length, and carries 10o theplaten N on one end and has fixed to the opposite end the armature g ofthe magnet II. Both magnets F and II are in the single main line.

The peculiar feature of my invention, so far as it relates to thereceiver, consists in the fact that both the type-wheel magnet F andprinting-magnet II are energized by'currents of the same polarity sentthrough one linewire, the armature of the former responding to theintermittent current and the armature of the latter respondin only tocurrents of greater strength. The intermittent current which energizesthe type-wheel magnet I? flows through the printing-magnet ll,'but isnot of sufficient strength to overcome the resistance of the spring fand attract the armature. The means by which this increase of strengthfor operating the armature of the printing-magnet is sent to line is asfollows:

Concentric with the annulus of plates A B C, &c., and insulatedtherefrom, is a metallic ring, "L, connected with a battery, A, andground, and to the keyC is attached the contact-point Z, which is in thepath of the ring '2', and normally out of contact therewith. \Vhen thekey 0 of the transmitter is retated so that the electrode 0 bears on theplate marked corresponding to the letter or character to be printed, thetype-wheels are also in requisite position over the platen to print thecorresponding letter or character. \Vhen the key 0 is in the positionaforesaid, the depression of said key by the operator brings the point Iin contact with the ring 1', and thereby allows the current of thebattery A to pass through the ring 2', thence through the key (J, andthence to line.

The strength of the two batteries A and A causes the printing-magnet llto overcome the resistance of the spring f and attract the armature g,attached. to the printing-lever. By the movement of said prin ting-lever the platen, over which runs the paper ribbon from a continuousroll, is broughtinto contact with the character to be printed, and whenthe key 0 of the transmitter is released the pointl automatically drawsout of contact with. the ring '1', and thus deprives the line of thestrength of the battery A and causes the printing-lever L to carrytheplaten away from the type-wheels, and in this movement of the leverthe small ratchet-wheel n on the end of platen is turned for anothercharacter by means of the sprin g-pawl n, as shown :in liig. l.

The movements of the lovers I and L are limited by means of stops in theusual manner. I prefer to employ two type-wheels arranged side by sideand movable laterally on their shaft 9, as hereinbefore described, oneof said wheels having letters and the other figures. The shifting of thetype-wheels is effected by the following mechanism: To an arm, m,rigidly attached to the shaft g, is pivoted a lever, 0, one end of whichis connected with the sleeve 9. To the printing-lever L are attached twoupward-projecting cams, 1.)

and. p, as shown in Figs. 4 and 5 of the drawings. Said cams stand insuch relative positions that the pressure of one cam on the free end ofthe lever 0 shifts the type-wheels E E in one direction, and thepressure of the other cam on the lever o, as aforesaid, shifts thetype-wheels in the opposite direction. By turning the type-wheels E E soto bring the free end of the lever 0 directly over one of the cams, andthen moving the printinglever L toward the type-wheels, the said camcrowds the lever 0 to one side, and thus shifts the type-wl'leelslaterally on their shaft. In order to enable the transmitter to controlthe aforesaid movement, I place the two cams p 1) one back of the otherin the direction of the length of the printing-lever, so that one camcan engage the lever sooner than the other cam during the rotation ofthe typewheels, and the annulus b of the transmitter T, I mark at properpoints, as shown at t and 2", at which to depress the key C, so as tocause the printing-lever to be actuated by the re-enforced current overthe line, as hereinbefore described.

0 designates the inking-roller, which may be composed of disks of feltor other suitable and well-known. material.

The mode of operation. is as follows: The apparatuses at both stationsstanding at zero, the lines connected with ground at said stationsthrough the call-bell branch, the sendlug-operator breaks theground-connectioi1 and connects with the transmitter T by means of aswitch, a, and thereby also causes a current to flow to line, operatingcall-bell at the receiving-station. As the movement of this switch cutsout the bell. of the transmittingstation, the operatm: may move backsaid switchforan answcr,-ilf he desires. This may not be reallynecessary, as a message may be received. in the absence of thereceiving-operator if the 'rcceiving-instrument is properly in circuit,and he may immediately proceed to transmit the message by turninthe keyC to the right, or in the direction of the hands of aelock, anddepressing for amoment when the key is opposite the desired letter, thenturning, as before, to the next, and so on.

As will be noticed, it is not necessary to make a complete revolutionfor each letter in a word, for in. many words the letters follow eachother in such a manner that several letters may be printed consemitivelyduring a single revolution of the key. For in stance, the word hotelwould require two revolutions in. the first H O T and in the secondE L.It the key is accidentally turned past the letter to be printed, the keymust make an entire revolution and be brought to the proper positionover the letter to be printed, as the key should not be turned backward.

\Vhat I claim. is-

In a printirig-telegraph, the combination, with the recording orreceiving instrument, of the transmitting-instrument, consisting of twoconcentric insulated annuli, one having a series of equidistantcontact-points and the other being continuous, and a rotating key havingcontact-points adapted to be brought into contact with the respectiveannuli to transmit (jllllfGlll'S of different strength to thetype-Whecloperating mechanism and the printing-lever, respectively,through suitable electrical connections and batteries, substantially asspecified.

2. The transinittiug-instruinent consisting of two concentric insulatedannuli, one having a series of interrupted contact-points and the otherbeing continuous, in. con'ihiuatioi'i with a rotating and vibratinglever and proper electrical connections, whereby intermittent pulsationsof dififereut strength may be sent to the receiviug-instrinnent when thetransmitting and receiving instrument are electrically couum-ted,substantially as specitied.

The comhination,\vith the n-inting-lever L and pivoted shaft g, of thelaterally-movable type-wheels E E, connected to the said shaft by grooveand feather, the arm m, projecting from said shaft, the lever 0, pivotedto said arm and connected at one end with the type-Wheels, and thecanispp, )roj ecting froni the printing-lever, one back of the other inthe direction of the length of said lever and adapted to engage the freeend of the lever 0 at opposite sides thereof, substantially as describedand shown.

In testimony whereof I have hereunto signed my name, in the presence oftwo witnesses, at Syracuse, in the county of Onondaga, in the St te ofNew York, this 28th day of January, 1

ARK \V. 'DEWEY.

